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Amiraneli [1.4K]
3 years ago
10

Round off the measurement to three significant figures 12.17º C

Chemistry
1 answer:
prohojiy [21]3 years ago
6 0
12.2 C
It has 3 significant figures now.
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Heating a solution of alcohol and water, then collecting the alcohol vapors and condensing them into a liquid with higher alcoho
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Answer:

Distillation.

Explanation:

If we are heating a mixture of two miscible liquids and collecting the vapors it means we are separating the two mixtures from each other based on their boiling point differences.

This technique of separation of two liquids based on the difference in boiling point is known as Distillation.

Alcohol will evaporate easily as compared to water as water has stronger influence of hydrogen bond making the inter-molecular forces stronger.

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What can humans do to reduce climate change
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The answer to your question is D!

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A sample of a compound made entirely from copper and oxygen was found to have a total mass of 0.143 g the mass of copper in the
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Mass of Oxygen: 0.0159 grams

Moles of Oxygen: 9.94x10^-4

To find the mass of oxygen, subtract the mass of copper from the total mass.

0.143-0.1271=0.0159

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To find how many moles there are, divide the given amount of oxygen by the molar mass (atomic mass) of oxygen because that mass is the same as one mole of oxygen.

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6 0
1 year ago
Which of the following is a likely mechanism for the reaction CH3Cl + OH- ----> CH3OH + Cl-, which is first order with respec
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Answer:

A one-step mechanism involving a transition state that has a carbon partially bonded to both chlorine and oxygen

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The compound CH3Cl is methyl chloride. This is a nucleophilic substitution reaction that proceeds by an SN2 mechanism. The SN2 mechanism is a concerted reaction mechanism. This means that the departure of the leaving group is assisted by the incoming nucleophile. The both species are partially bonded to opposite sides of the carbon atom in the transition state.

Recall that an SN2 reaction is driven by the attraction between the negative charge of the nucleophile (OH^-) and the positive charge of the electrophile (the partial positive charge on the carbon atom bearing the chlorine leaving group).

4 0
3 years ago
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